NS 9022:1981 Phenol, o-cresol, m-cresol, p-cresol; cresylic acid and xylenols for industrial use — Methods of test — Part 7: Measurement of colour (Cresylic acid and xylenols only)
1981NS 9022:1981 Phenol, o-cresol, m-cresol, p-cresol; cresylic acid and xylenols for industrial use — Methods of test — Part 7: Measurement of colour (Cresylic acid and xylenols only)